Heat dissipation unit

ABSTRACT

A heating system that allows independent control of the temperatures within different rooms in a building by independently controlling the flow of heating fluid to each room in response to a thermostat provided in each individual room. The output of the thermostat controls the operation of a three-way valve upstream of a radiator or convector in each room. When the room temperature is at or above the setpoint for that room, the valve operates to divert all heating fluid flow through a bypass pipe or shunt extending from the valve to the outlet of the radiator or convector. When the temperature drops below the setpoint, the valve operates to resume heating fluid flow through the radiator or convector while shutting off heating fluid flow through the bypass pipe. In another embodiment, independent control of room temperature in heated air distribution systems, is effected by thermostatically controlled louvers provided at the heated air register in each room. When the room temperature is at or above the setpoint for the particular room, the louvers shut off heated air flow to the room thereby preventing further heating of the room.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a system for independently controlling the climate in individual rooms within a building.

2. Description of the Prior Art

Most heating systems currently in use for heating buildings, control building temperature by controlling the temperature of the heating fluid at a central location. Thus, the temperature of heating fluid supplied to each room is about the same throughout the building. However, different rooms within a building often have different heating requirements. For example, some rooms may receive more sunlight than other rooms, or rooms that are located upstream in a wind, relative to other rooms in the building, tend to lose heat faster than the other rooms. Therefore, when all the rooms in a building are supplied with a heating fluid at the same temperature, some rooms tend to be come uncomfortably hot while other rooms become uncomfortably cold.

For the aforementioned reasons, various systems have been proposed in the prior art for independently controlling the temperature in different rooms within a building.

U.S. Pat. No. 2,575,907, issued to Carlson, shows a heating system where thermostats are provided in individual rooms for controlling the mixing ratio of air passing through a radiator and air that bypasses the radiator. Carlson does not show an electromagnetically controlled valve for diverting liquid from a heat dissipation unit or louvers that completely shut off air flow through a warm air register.

U.S. Pat. No. 4,192,455, issued to Rasmussen et al., shows a heating system where flow through individual radiators is controlled by a valve responsive to a sensor located in each room. Rasmussen et al. do not show the bypass pipe of the present invention or louvers that completely shut off air flow through a warm air register.

U.S. Pat. No. 4,206,874, issued to Semple, shows a heating system where flow through each radiator is controlled by an associated control valve. Semple does not show individual thermostatic control of the valves for each radiator, or louvers that completely shut off air flow through a warm air register.

U.S. Pat. No. 4,433,810, issued to Gottlieb, shows a heating system where heat dissipation through individual radiators is controlled by controlling the speed of a centrifugal pump used to circulate liquid through the heating system. Gottlieb does not show an electromagnetically controlled valve for diverting liquid from a heat dissipation unit or louvers that completely shut off air flow through a warm air register.

U.S. Pat. No. 5,178,324, issued to Moesby, shows a heating system where flow through individual radiators is controlled by a thermostatic valve. Moesby does not show the bypass pipe of the present invention or louvers that completely shut off air flow through a warm air register.

U.S. Pat. No. 5,344,069, issued to Narikiyo, shows a hot air heating system where heating of individual rooms is independently controlled by secondary heaters provided for each room. Dampers 13 in Narikiyo are not designed to completely shut off the flow of heated air to each room, unlike the louvers of the present invention.

U.S. Pat. No. 5,367,601, issued to Hannabery, shows a heat pump having a supplemental heating unit. Hannabery does not address the independent control of temperature in individual rooms in a building.

U.S. Pat. No. 5,373,987, issued to Corabatir, shows an apparatus for controlling the flow rate of heating air in response to a thermostat located in the room being heated. Corabatir controls air flow by changing the gap between annular sleeves and a circular end plate. Corabatir does not teach or suggest the elongated rectangular louvers and the associated actuating mechanism used in the present invention.

German Patent Document Number 3133681 A1, by Braun, shows a heating system where flow through a radiator is controlled by a thermostatic valve. Moesby does not show the bypass pipe of the present invention or louvers that completely shut off air flow through a warm air register.

None of the above inventions and patents, taken either singly or in combination, is seen to describe the instant invention as claimed.

SUMMARY OF THE INVENTION

The present invention is directed to a heating system that allows independent control of the temperatures within different rooms in a building by independently controlling the flow of heating fluid to each room in response to a thermostat provided in each individual room. In the present invention, the output of the thermostat controls the operation of a three-way valve upstream of a radiator or convector in each room. When the room temperature is at or above the setpoint for that room, the valve operates to divert all heating fluid flow through a bypass pipe or shunt extending from the valve to the outlet of the radiator or convector. In this way, heat is no longer supplied to the room while the flow through the bypass minimizes any disturbance in the fluid flow conditions in the rest of the heating fluid supply circuit. When the temperature drops below the setpoint, the valve operates to resume heating fluid flow through the radiator or convector while shutting off heating fluid flow through the bypass pipe.

In another embodiment, independent control of room temperature in heated air distribution systems, is effected by thermostatically controlled louvers provided at the heated air register in each room. In this embodiment, when the room temperature is at or above the setpoint for the particular room, the louvers shut off heated air flow to the room thereby preventing further heating of the room. When the temperature drops below the setpoint, the louvers are opened allowing the heating of the room to resume.

Accordingly, it is a principal object of the invention to provide for the independent control of the temperature in individual rooms within a building.

It is another object of the invention to minimize the effect of shutting off heating fluid flow to any one room, on the rest of the heating system.

It is a further object of the invention to provide thermostatically controlled louvers that shut off heated air flow to a room when the room temperature reaches the thermostat setpoint.

Still another object of the invention is to provide a system for the independent control of the temperature in individual rooms within a building, which is retrofittable to existing heating systems.

It is an object of the invention to provide improved elements and arrangements thereof in an apparatus for the purposes described which is inexpensive, dependable and fully effective in accomplishing its intended purposes.

These and other objects of the present invention will become readily apparent upon further review of the following specification and drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of the heat dissipation sub-system of the present invention.

FIG. 2 is a detailed cross sectional view of the three way valve of the present invention.

FIG. 3 is a schematic diagram of the heat dissipation sub-system of the present invention fitted with an anti-backup fitting.

FIG. 4 is a block diagram of a heating system of the two-pipe type employing the heat dissipation sub-system of the present invention.

FIG. 5 is a block diagram of a heating system of the single pipe type employing the heat dissipation sub-system of the present invention.

FIG. 6 is a schematic diagram of an air distribution type of heating system employing the thermostatically controlled louvers of the present invention.

FIG. 7 is a perspective view showing details of the thermostatically controlled louvers of the present invention.

Similar reference characters denote corresponding features consistently throughout the attached drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring to FIGS. 1, 2, and 3 the first embodiment of the present invention is seen. The first embodiment relates to a heat dissipation sub-system 10 which includes a heat dissipation unit 12, a heating liquid inlet 14, a heating liquid outlet 16, a three-way valve 18, and a bypass or shunt pipe 20. The valve 18 is actuated by solenoid 22. Solenoid 22 is responsive to thermostat 24 which controls the power supply to the solenoid. Solenoid 22 is preferably of the mercury switch type. Valve 18 has a movable member 26 which is biased by spring 28 to assume a first position. When member 26 is in the first position, valve 18 prevents any flow through bypass pipe 20 and directs all heating fluid coming through inlet 14 through the heat dissipation unit 12. When the room temperature is at or above the setpoint of thermostat 24, the solenoid 22 is energized causing the member 26 to move to a second position. When member 26 is in the second position, valve 18 prevents any flow through heat dissipation unit 12 and directs all heating fluid entering inlet 14 to the bypass pipe 20. In this manner, heating of each room is independently controlled.

Heat dissipation unit 12 can be any suitable heat exchanger including a radiator or a convector with or without a fan or blower. In the most preferred embodiment, an anti-backup fitting 30 is provided intermediate the heat dissipation unit 12 and the outlet 16. The anti-backup fitting 30 is in the form of a pipe section having a bend portion 32. The bend portion 32 rises, in elevation, above the discharge opening 34 of the heat dissipation unit 12. By having the bend portion 32 rise above the discharge opening 34, heating fluid is prevented from backing up into the heat dissipation unit 12 with the aid of gravity when the heating fluid flow is being diverted through the bypass pipe 20.

Referring to FIG. 4, the heat dissipation sub-system 10 is shown incorporated in the heating system of a building. The heating system of FIG. 4 is of the two-pipe type, with one heating fluid supply pipe 36 and one heating fluid return pipe 38. In the heating system of FIG. 4, the heat dissipation sub-systems 10 are connected in parallel between the heating fluid supply pipe 36 and the heating fluid return pipe 38. Each heat dissipation sub-system 10 is connected to the heating fluid supply pipe 36 at its inlet 14 and to the heating fluid return pipe 38 at its outlet 16.

Each of the rooms 40, 44, 46, and 48 is provided with at least one heat dissipation sub-system 10. Each heat dissipation sub-system 10 is provided with an associated thermostat 24 located in the same room as the heat dissipation sub-system 10. Thus the thermostat setpoint can be set independently for each room. Hot water, for example, is pumped from boiler 50 through the heating system by pump 52. When the temperature in any given room is reaches the setpoint for that room, the valve 18 operates to direct heating fluid flowing through inlet 14 to the bypass pipe 20 for that room. Thus, heating fluid no longer flows through the heat dissipation unit 12 for that particular room, and heating of that room is ceased. Despite the fact that the heat dissipation unit 12 for the room is now off-line, because the flow that would normally have gone through the heat dissipation unit 12 is now directed through the bypass 20, the flow through the other heat dissipation units 12 will not be affected. In addition, the back pressure on pump 52 will not be increased, and overall the dynamics of controlling the heating system will not be made more complicated. When the temperature in the room drops below the setpoint, the valve 18 operates to resume heating fluid flow through the heat dissipation unit 12 while shutting off heating fluid flow through the bypass pipe 20.

Referring to FIG. 5, the heat dissipation sub-system 10 is shown incorporated in a heating system of the single pipe type. In the heating system of FIG. 5, heating fluid is supplied to the inlet 14 of each heat dissipation sub-system 10 through the pipe 54, and heating fluid is returned from the outlet 16 of each of the heat dissipation sub-systems 10 to the same pipe 54. All other components in the heating system of FIG. 5 function in the same manner as discussed with respect to the heating system of FIG. 4.

For large rooms, providing more than one heat dissipation sub-system in a room, with each having its own associated thermostat, allows the maintenance of different temperature zones within the same room.

Referring to FIGS. 6 and 7, the second embodiment of the invention can be seen. FIG. 6 shows a typical air distribution heating system. Rooms 40, 44, 46, and 48 are heated by heated air blown into the rooms through respective registers 56, 58, 60, and 62. The heated air supplied by furnace 64 is moved through registers 56, 58, 60, and 62 by blower 66. As before, each room has its own thermostat 24. However in this embodiment, each thermostat 24 controls the opening and closing of a set of louvers 68 provided at each of the registers 56, 58, 60, and 62. When the room temperature is at or above the setpoint for the particular room, the louvers shut off heated air flow to the room thereby preventing further heating of the room. When the temperature drops below the setpoint, the louvers are opened allowing the heating of the room to resume.

Referring to FIG. 7, the louvers 68 are hinged and pivot between a closed position and an open position. Arms 70 are fixed to respective louvers 68 and pivot therewith. Bar 72 ensures that all the louvers 68 in a given set pivot in unison. Thermostat 24 controls power supply to a solenoid 74. Spring 76 causes the louvers 68 to be normally open. When the room temperature reaches the setpoint, solenoid 74 is energized, causing bar 72 to be pushed toward the louvers to thereby close the louvers. As before, when the room temperature drops below the set point, the solenoid 74 is deenergized allowing louvers 68 to open due to the force exerted by spring 76. Although a solenoid was employed in the illustrative examples described above, it should be apparent to those of ordinary skill in the art that a rotary electric motor could also have been used to accomplish the same tasks.

It is to be understood that the present invention is not limited to the embodiments described above, but encompasses any and all embodiments within the scope of the following claims. 

I claim:
 1. A heat dissipation sub-system comprising:a heat dissipation unit having an inlet opening and a discharge opening, said heat dissipation unit being dimensioned and configured to allow heat transfer from a heating fluid flowing therethrough to air contained in a room, said discharge opening being in fluid communication with a discharge conduit; an anti-backup fitting provided intermediate said discharge opening and said discharge conduit, said anti-backup fitting having a bend portion, said bend portion being located at an elevation above said discharge opening; a three-way valve having a movable member, said movable member being movable between a first and a second position, said three-way valve having a valve inlet, a first outlet, and a second outlet, said movable member allowing fluid communication between said valve inlet and said first outlet when in said first position, said movable member allowing fluid communication between said valve inlet and said second outlet when in said second position, and said first outlet being in fluid communication with said inlet opening; and a bypass pipe having a bypass pipe inlet and a bypass pipe outlet, said bypass pipe inlet being in fluid communication with said second outlet, and said bypass pipe outlet being in fluid communication with said discharge conduit, whereby said three-way valve selectively directs heating fluid through said heat dissipation unit and said bypass pipe.
 2. The heat dissipation sub-system according to claim 1, further including an electromechanical actuating mechanism mechanically linked to said movable member to thereby move said movable member between said first and second positions.
 3. The heat dissipation sub-system according to claim 2, wherein said electromechanical actuating mechanism moves said movable member responsive to a thermostat located in the room, said thermostat communicating with said electromechanical actuating mechanism and causing said movable member to be moved to said second position when air temperature in the room reaches a user selected setpoint temperature.
 4. A heating system for heating a plurality of rooms within a building, said heating system comprising:a source of heating fluid supplying heating fluid; a piping system for conducting said heating fluid to each of the plurality of rooms, said source of heating fluid being in communication with said piping system; a pump for circulating said heating fluid through said piping system; and at least one heat dissipation sub-system provided in each of the plurality of rooms, said heat dissipation sub-system receiving heating fluid from said piping system, said heat dissipation sub-system including,a heat dissipation unit having an inlet opening and a discharge opening, said heat dissipation unit being dimensioned and configured to allow heat transfer from said heating fluid flowing therethrough to air contained in a respective one of the plurality of rooms, said discharge opening being in fluid communication with a discharge conduit, an anti-backup fitting provided intermediate said discharge opening and said discharge conduit, said anti-backup fitting having a bend portion, said bend portion being located at an elevation above said discharge opening, a three-way valve having a movable member, said movable member being movable between a first and a second position, said three-way valve having a valve inlet, a first outlet, and a second outlet, said movable member allowing fluid communication between said valve inlet and said first outlet when in said first position, said movable member allowing fluid communication between said valve inlet and said second outlet when in said second position, and said first outlet being in fluid communication with said inlet opening, and a bypass pipe having a bypass pipe inlet and a bypass pipe outlet, said bypass pipe inlet being in fluid communication with said second outlet, and said bypass pipe outlet being in fluid communication with said discharge conduit, whereby said three-way valve selectively directs heating fluid through said heat dissipation unit and said bypass pipe; said piping system includes a heating fluid supply pipe communicating with said valve inlet of said at least one heat dissipation sub-system in each of the plurality of rooms, and a heating fluid return pipe communicating with said discharge conduit of said at least one heat dissipation sub-system in each of the plurality of rooms.
 5. The heating system according to claim 4, wherein said at least one heat dissipating sub-system further includes an electromechanical actuating mechanism mechanically linked to said movable member to thereby move said movable member between said first and second positions.
 6. The heating system according to claim 5, wherein said at least one heat dissipating sub-system further includes a thermostat located in a respective one of the plurality of rooms, said electromechanical actuating mechanism moving said movable member responsive to said thermostat, said thermostat communicating with said electromechanical actuating mechanism and causing said movable member to be moved to said second position when air temperature in the respective one of the plurality of rooms reaches a user selected setpoint temperature. 